Meningitis due to other and unspecified causes (G03) ICD-10-CM
The G03 code range covers meningitis due to other and unspecified causes with 6 ICD-10-CM diagnosis codes. 5 of them are billable and valid for claim submission in fiscal year 2027, and the category headers group them but cannot themselves be billed.
Includes
This note appears immediately under a three character code title to further define, or give examples of, the content of the category.
- arachnoiditis NOS
- leptomeningitis NOS
- meningitis NOS
- pachymeningitis NOS
Type 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
Codes in the G03 Range 6 codes · 5 billable
Clinical Terms in This Code Range
Definitions from the National Library of Medicine for conditions coded in the G03 range.
Meningitis
Inflammation of the coverings of the brain and/or spinal cord, which consist of the PIA MATER; ARACHNOID; and DURA MATER. Infections (viral, bacterial, and fungal) are the most common causes of this condition, but subarachnoid hemorrhage (HEMORRHAGES, SUBARACHNOID), chemical irritation (chemical MENINGITIS), granulomatous conditions, neoplastic conditions (CARCINOMATOUS MENINGITIS), and other inflammatory conditions may produce this syndrome. (From Joynt, Clinical Neurology, 1994, Ch24, p6)
About the G03 Code Range
Meningitis appears here among inflammatory diseases of the central nervous system when its cause is listed as other or unspecified.
The subdivisions distinguish nonpyogenic meningitis, meaning meningitis that does not produce pus, in G03.0; chronic meningitis in G03.1; and benign recurrent meningitis in G03.2. They also separate other specified causes in G03.8 from unspecified meningitis in G03.9.
Questions About This Page
How many billable codes are in the G03 range?
Of the 6 codes in this range, 5 are billable and valid for claim submission from October 1, 2026 through September 30, 2027. Category header codes group them but cannot be reported on claims.
What does the G03 range classify?
The range classifies meningitis due to other and unspecified causes. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2027 ICD-10-CM Tabular List and order file, effective October 1, 2026 through September 30, 2027.
